5. We'd like to know what you can offer as well as your sales conditions.
我們想了解你們能供應什么，以及你們的銷售條件。
還能這樣說：
We want to know your offer and the sales condition.
We'd like to inquire about the offer and sales condition.
應用解析：
bring-and-buy sale 義賣；
for/on sale 待售，出售；上市

6. How much do you charge for the goods per unit?
你們每件要價多少呢？
還能這樣說：
How much have you quoted per unit of the goods?
What's the price of per unit?
應用解析：
under the charge of 由……看管，由……負責；
charge for trouble 手續費；
take charge of 負責，看管

7. How soon can you have your product ready?
你們多久才可以把產品準備好呢？
還能這樣說：
How long does it usually take you to make delivery?
When will it be delivered to me?
應用解析：
Ready, present, fire!
（軍）預備，瞄準，放！

8. Please inform us the quantity that can be supplied from stock.
請告知可供現貨的數量。
還能這樣說：
Can you tell us about the quantity you can provide?
I'd like to know the quantity you can supply.
應用解析：
stocks and stones 無生命之物；木石；遲鈍的人，死氣沉沉的人